Here is the full list of all 77 Tower of Time achievements.
Win battle when whole party has less than 10 HP
Win combat with health and mana of every champion under 10%
Use Blind Rage 2 times in one combat
Use Gravity Well 4 times in one combat
Deal 10000 damage in one combat with Rain of Arrows
Reach the ultimate attribute cap of 40 for any attribute.
Craft 30 items
Cast Elemental Barrage 25 times in one combat
Use Teleport 5 times in one combat
Kill 5 enemies in one combat with Blades of Justice
Blind 20 enemies in one combat
Apply weakness to 20 enemies in one combat.
Apply 30 upgrades to items
Withdraw from battle 100 times.
Get Cindros Sword
Summon Mech 4 times in one combat
Transmute gems 30 times
Equip all Relics on one character
Kill 3 enemies in one fight with Headshot
Increase a single skill to a maximum.
Learn all 6 skills on a single hero.
Reach the 25 point attribute cap for any attribute.
Apply 10 enchantments
Win a fight on level 4 or higher with 2 or less champions
Place Exploding Runes 5 times in one combat
Cast Fireball 5 times in one combat
Finish battle with full hp of whole party
Unlock Mystic Whisper.
Find all Sleath notes.
Use Dash skill 10 times in one combat
Unlock Blademaster Boron.
Resolve the conflicts between the Water and Earth Servants.
Reach level 6 with any hero.
Solve the puzzle of the clocks.
Win battle with a caged hero
Defeat Ancient Guard
Heal 1000 damage in one fight with Healing Totem
Unlock Runelord Rakhem.
Equip all items for a hero.
Deal 1000 damage with Ent in one combat
Upgrade Mage Tower.
Kill 100 enemies.
Unlock Druid Aeric.
Kill death reaper
Heal hero which has less than 5 HP
Upgrade Armory.
Use Teleporter.
Win battle with just one champion
Obtain a legendary item.
Kill first enemy